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| Patents for Helen F. Lillis | |||||
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| Number | Date | Patentee | Title | Type | |
| 983,562 | Feb. 07, 1911 | M. Murray | Pipe Flange Wrench | ratchet wrenches | |
| D42,347 | Mar. 26, 1912 | A.D. Armstrong | Design for a Level | levels | |
| 1,081,700 | Dec. 16, 1913 | F.W. Riesenberg | Wrench | chain and strap wrenches | |
| 1,122,165 | Dec. 22, 1914 | L. Schoening | Pliers | pliers | |
| 1,363,288 | Dec. 28, 1920 | C.A. Swanson | Mower-guard | hay or straw cutters | |
| 1,421,485 | Jul. 04, 1922 | E.E. Jones | Cone belt shifter | industrial machine pulleys and belt drive mechanisms | |